. >> reporter: we told you about the fbi's timeline on keys, how they believe he wandered the country looking for people to kill, how he buried casches of weapon. some he wanted to use for future killings. he used a debit card belonging to one of his victims, that's who i was caught. investigators spoke to him for nine hours and are releasing a small part of those interrogations. >> there is no one who knows me or who has ever known me who knows anything about me really. they know they are going to tell you something that does not line up with anything i tell you, because i'm two different people basically. the only person who knows about what i'm telling you, the kind of things i'm telling you is me. >> how long have you been two different people? [laughter] >> a longtime. 14 years. >> reporter: police believe israel keys began his murder spree after getting out of the military in 2000 e. worked as a carpenter to pay for his horrific crimes. he's confessed to willing more than eight people. investigators were set to interview again this week, jenna. as we told you yesterday he was fo